166625516935816 has 16 divisors (see below), whose sum is σ = 313489133829900. Its totient is φ = 83028414581184.

The previous prime is 166625516935741. The next prime is 166625516935873. The reversal of 166625516935816 is 618539615526661.

It can be written as a sum of positive squares in 2 ways, for example, as 131412520060900 + 35212996874916 = 11463530^2 + 5934054^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35542983351 + ... + 35542988038.

Almost surely, 2^{166625516935816} is an apocalyptic number.

It is an amenable number.

166625516935816 is a deficient number, since it is larger than the sum of its proper divisors (146863616894084).

166625516935816 is a wasteful number, since it uses less digits than its factorization.

166625516935816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71085971688 (or 71085971684 counting only the distinct ones).

The product of its digits is 419904000, while the sum is 70.

The spelling of 166625516935816 in words is "one hundred sixty-six trillion, six hundred twenty-five billion, five hundred sixteen million, nine hundred thirty-five thousand, eight hundred sixteen".